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| Author | : United States. Environmental Protection Agency. Office of Research and Monitoring |
| Publisher | : |
| Total Pages | : |
| Release | : 1971 |
| Genre | : |
| ISBN | : |
| Author | : Soap and Detergent Association |
| Publisher | : |
| Total Pages | : 138 |
| Release | : 1972 |
| Genre | : Phosphates |
| ISBN | : |
| Author | : Soluble Phosphorus in the Activated Sludge Process, Part 1- Chemical-Biological Process Performances, Part 2- Sludge Digestion Study |
| Publisher | : |
| Total Pages | : 35 |
| Release | : 1971 |
| Genre | : |
| ISBN | : |
| Author | : U.S. Environmental Protection Agency |
| Publisher | : BiblioGov |
| Total Pages | : 128 |
| Release | : 2013-11 |
| Genre | : |
| ISBN | : 9781294275329 |
The U.S. Environmental Protection Agency (EPA) was introduced on December 2, 1970 by President Richard Nixon. The agency is charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress. The EPA's struggle to protect health and the environment is seen through each of its official publications. These publications outline new policies, detail problems with enforcing laws, document the need for new legislation, and describe new tactics to use to solve these issues. This collection of publications ranges from historic documents to reports released in the new millennium, and features works like: Bicycle for a Better Environment, Health Effects of Increasing Sulfur Oxides Emissions Draft, and Women and Environmental Health.
| Author | : U.S. Environmental Protection Agency |
| Publisher | : BiblioGov |
| Total Pages | : 128 |
| Release | : 2013-11 |
| Genre | : |
| ISBN | : 9781293275795 |
The U.S. Environmental Protection Agency (EPA) was introduced on December 2, 1970 by President Richard Nixon. The agency is charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress. The EPA's struggle to protect health and the environment is seen through each of its official publications. These publications outline new policies, detail problems with enforcing laws, document the need for new legislation, and describe new tactics to use to solve these issues. This collection of publications ranges from historic documents to reports released in the new millennium, and features works like: Bicycle for a Better Environment, Health Effects of Increasing Sulfur Oxides Emissions Draft, and Women and Environmental Health.
| Author | : David A. Long |
| Publisher | : |
| Total Pages | : 119 |
| Release | : 1971 |
| Genre | : Sewage |
| ISBN | : |
The objective was to develop and evaluate, at full plant scale, the combined chemical-biological process of phosphorus removal. Alum proved to be a more effective precipitant than sodium aluminate in the moderately alkaline wastewater used. Total phosphorus concentration of the unfiltered effluent was dependent upon effluent suspended solids levels as well as on effluent soluble phosphorus concentrations. Removal of organic matter was improved as a result of chemical addition in the chemical-biological process. The chemical-biological process produced approximately twice as much weight of sludge as did the parallel control. Alum addition did not reduce the sludge volume index (SVI) of the mixed liquor whereas sodium aluminate addition resulted in significant decreases. Costs for chemical precipitation of phosphorus in the chemical-biological process are estimated.
| Author | : United States. Environmental Protection Agency |
| Publisher | : |
| Total Pages | : 100 |
| Release | : 1971 |
| Genre | : |
| ISBN | : |
| Author | : Michael H. Gerardi |
| Publisher | : Chemical Publishing Company |
| Total Pages | : 176 |
| Release | : 2016-05-19 |
| Genre | : Technology & Engineering |
| ISBN | : 082060416X |
Contents - List of Tables - List of Figures - PART ONE: NITRIFICATION - Chapter 1 Introduction - Chapter 2 Nitrogenous and Phosphorous Compounds - Chapter 3 Nitrification: The Basics - Chapter 4 Nitrifying Bacteria - Chapter 5 Nitrification and Limiting Factors - Chapter 6 Promoting Nitrification - PART TWO: DENITRIFICATION - Chapter 7 Denitrification: The Basics - Chapter 8 Denitrifying Bacteria - Chapter 9 Denitrification and Limiting Factors - PART THREE: BIOLOGICAL PHOSPHORUS REMOVAL - Chapter 10 Biological Phosphorus Removal: The Basics - Chapter 11 EBPR: Process Control - Abbreviations and Acronyms - Glossary - Bibliography - Biological nutrient removal (BNR), the removal of nitrogen and phosphorus from wastewater, is a complex process. Although the activated sludge process is an efficient technology for the removal of biochemical oxygen demand (BOD) and total suspended solids (TSS), it provides less-than-optimal conditions for the removal of nitrogen and phosphorus, and presents numerous challenges to the operator trying to satisfy the many requirements for several different groups of bacteria. In addition to satisfying the requirements there are numerous, highly variable operational conditions that impact BNR. These conditions include: changes in strength and composition of the wastewater, alkalinity and pH, temperature, and presence of inhibitory and toxic wastes. Even fluctuations in flows, especially from inflow and infiltration, can adversely impact the aerobic, anoxic, and anaerobic conditions needed for successful BNR. Of the three treatment processes, nitrification, denitrification, and enhanced biological removal, nitrification is often the most difficult to achieve. Therefore, a large portion of this book reviews nitrification. Operators of the activated sludge process need to understand the basic biological, chemical, and physical requirements for BNR in order to improve the performance of these treatment processes. An Operator's Guide to Biological Nutrient Removal (BNR) in the Activated Sludge Process is intended to help operators in the monitoring, troubleshooting, and process control of BNR. Numerous tables and figures are included in the book to help the operator understand the biological and chemical reactions that are involved in BNR processes and how the reactions can be monitored for process control. Design of BNR processes is not addressed in this book. Design is addressed in numerous engineering publications. The book serves to help operators achieve permit compliance for nitrogen and phosphorus discharge limits and obtain cost-effective operation. -
